BC Climate: Monthly summary and long term trends

Author

Affiliation

Aseem Sharma e-mail: aseem.sharma@gov.bc.ca

Future Forest Ecosystems Centre, FCCSB, OCF, BC Ministry of Forests

1 November-2023 climate summary

• November-2023 was on average 3.75°C more warmer than normal.
• November-2023 was drier then normal for lower latitude regions while wetter then normal at north-west region.
• The average of previous 12 months climate parameters indicate that BC experienced substantially warmer and slightly drier climate then normal between October 2022 and November 2023.
• The mean November 2023temperature in BC is increasing but the rate of increase is not statistically.
• The long-term November 2023 precipitation indicate slight increase (0.23 mm per year) in spatially averaged total precipitation across BC .

Below you find the spatial anomalies and long term trend of air temperature, vapor pressure deficit (VPD), total monthly precipitation, relative humidity (RH), and volumetric soil moisture (0 - 1m depth) for the month of November-2023.

2 Mean temperature and vapor pressure deficit (VPD)

2.1 Anomaly: November-2023

Figure 1: Anomalies in mean temperature and VPD for November 2023 relative to climate average of November 1981 - 2010.

2.2 Last 12 months anomaly: October 2022 to November 2023

Figure 2: Average anomalies in mean temperature and VPD for October 2022 to November 2023 relative to climate average of 1981 - 2010 .

2.3 Long term trends

2.3.1 Spatial trends: November 1950 - 2023

Figure 3: Spatial trends of mean temperature and VPD anomalies for November 2023 :1950 - 2023 .The black dot indicates grid cells with statistically signficnat trends. Anomalies are calcuated relative to 1981-2010 climatology

2.3.2 Time series trends: November 1950 - 2023

Figure 4: Trend in spatially averaged anomalies of mean temperature and VPD for November 2023 :1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology

3 Precipitation, Relative Humidity (RH) and soil moisture

3.1 Anomaly: November-2023

Figure 5: Anomalies in total precipitation, relative humidity and volumetric soil mositure (0-1m) for November 2023 relative to climate average of November 1981 - 2010.

3.2 Last 12 months anomaly: October 2022 to November 2023

Figure 6: Anomalies in total precipitation, relative humidity and volumetric soil moisture (0-1m) for October 2022 to November 2023 relative to climate average of 1981 - 2010.

3.3 Long term trends

3.3.1 Spatial trends: November 1950 - 2023

Figure 7: Spatial trends of precipitation, relative humidity, and soil moisture anomalies for November 2023 :1950 - 2023 .The black dot indicates grid cells with statistically signficnat trends. Anomalies are calcuated relative to 1981-2010 climatology

Figure 8: Trend in spatially averaged anomalies of precipitation, relative humidity and soil moisture for November 2023 :1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology

4 BC seasonal and annual climate trends

4.1 Winter

4.1.1 Mean temperature and VPD

4.1.1.1 Spatial trends

Figure 9: Spatial trends of the anomalies of mean temperature and VPD for winter:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.1.1.2 Time-series trends

Figure 10: Trend in spatially averaged anomalies of mean temperature and VPD for winter:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.1.2 Precipitation, relative humidity and soil moisture

4.1.2.1 Spatial trends

Figure 11: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for winter:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.1.2.2 Time-series trends

Figure 12: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for winter:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.2 Spring

4.2.1 Mean temperature and VPD

4.2.1.1 Spatial trends

Figure 13: Spatial trends of the anomalies of mean temperature and VPD for spring:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.2.1.2 Time-series trends

Figure 14: Trend in spatially averaged anomalies of mean temperature and VPD for spring:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.2.2 Precipitation, relative humidity and soil moisture

4.2.2.1 Spatial trends

Figure 15: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for spring:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.2.2.2 Time-series trends

Figure 16: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for spring:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.3 Summer

4.3.1 Mean temperature and VPD

4.3.1.1 Spatial trends

Figure 17: Spatial trends of the anomalies of mean temperature and VPD for summer:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.3.1.2 Time-series trends

Figure 18: Trend in spatially averaged anomalies of mean temperature and VPD for summer:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.3.2 Precipitation, relative humidity and soil moisture

4.3.2.1 Spatial trends

Figure 19: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for summer:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.3.2.2 Time-series trends

Figure 20: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for summer:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.4 Fall

4.4.1 Mean temperature and VPD

4.4.1.1 Spatial trends

Figure 21: Spatial trends of the anomalies of mean temperature and VPD for fall:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.4.1.2 Time-series trends

Figure 22: Trend in spatially averaged anomalies of mean temperature and VPD for fall:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.4.2 Precipitation, relative humidity and soil moisture

4.4.2.1 Spatial trends

Figure 23: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for fall:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.4.2.2 Time-series trends

Figure 24: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for fall:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.5 Annual

4.5.1 Mean temperature and VPD

4.5.1.1 Spatial trends

Figure 25: Spatial trends of the anomalies of mean temperature and VPD for annual:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.5.1.2 Time-series trends

Figure 26: Trend in spatially averaged anomalies of mean temperature and VPD for annual:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.

4.5.2 Precipitation, relative humidity and soil moisture

4.5.2.1 Spatial trends

Figure 27: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for annual:1950 - 2023 .The black dot indicates grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.5.2.2 Time-series trends

Figure 28: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for annual:1950 - 2023 . Anomalies are calcuated relative to 1981-2010 climatology.